Internal-combustion engine.



0. E. WEIDNER.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAY 21, 191-4.

Patented Nov. 17, 1914.

SHEET 1.

2 SHEETS- 0. E. WEIDNER. iNTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAY 21, 1914.

1, 1 1 7,933. Patented Nov. 17, 1914.

2 SHEETS-SHBET 2.

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Application filed L117 :11. 191d. Serial lie, lllbfikh.

To (175 w/lom, it may concern:

Be i known that I, Dram E, i /mouse, a citizen or he United States,residing at Arcola, in rne county of Douglas and state of Illinois, haveinvented certain new and we fill Improvements in internal-CombustionEngines; end I do declare the following lo be a full, clear, and exactdescription of the invention, such as will enable others skilled in theto which is appertains to make and use It? s same.

This invention relates to internal combuslion engines and moreparticularly to the class of en ines of two-cycle explosive type inwhich ins explosive mixture 1s first compressed before ignition.

The object of the invention is to provide simple and eiiici-en'i meansfor injectine the explosive inislure into the combustion c amber and"which will operate to thoroughly clean "the combustion chamber of deador spent gases whereby a rhorough carburation of the explosive chamberis obtained.

With the above and other objects in view, the invention consists ofcertain novel features of conseruction, combination and arrangement ofparts as will be more fully escribed and claimed.

In the accompanying drawings: Figure 1 represents a vertical sectionalview of an engine consiruched in accordance with this invention and withthe piston at its extreme limit of its compression stroke; Fig. 2 is asimilar view with "the piston at the limit of iis working stroke.

in the embodiment illustrated, a cylinder 1 is shovvn having an enlargedlower portion 2 and in which a correspondingl shaped piston 3 isdesigned to o erate and between the laterally extending s oulders 2' and3' of sold cylinder and pistonis formed a combusiion chamber i bovin theusual sparking plug 5 extending iliereinto near the upper end of thecombustion chamber. The piston 23 is made hollow with a transversepartition 6 spaced a suieable distance from ills ouier end to form a gasreceiving piston chamber 7'. This chamber 7 has an opening 8 in one sideWall adjacent the partition 6 for a purpose to be described. At the 11per or outer end of the reduced portion 0 the cylinder 1 whichconsii'utes the compreseach chamber, is formed a by-pass 9 designed locooperate with the opening 8 in the piston chamber at predeterminedintervals as will he hereinafter described.

The compression cylinder 1 is provided i ntermediaiely oi its ends withan inlet 10 I01 lhe exploshe mixture which inlet communicates with acarburetor 11 of any suitable construction.

'lhe inner portion 2 of the cylinder 1 which constitutes the combustionchamber is provided near irs lower end Willi an exhaust port 12 forspent gases.

The piston 3 is provided with suitable seats 13 in the periphery of itslarger poriron to receive packings for insuring a fluid t ght connectionbetween this portion of the piston and she Walls of the combustioncyllnder such as are'usually employed in apparatus of this character.The smaller and larger POi'lJlOi'ii-l oi the cylinder 1 which form thecompression and conibussion cylinders, may be made integral as shown orrigidly connected in any suitable manner. The double integral pislon ismachined to fit both of said cylinders and lhe openinl 8 of the chamber7 at the solar end of said piston 13 positioned to register with thelower end of the by pass 9 when she piston is at or near the extremelimit of its compression stroke as shown in Fig. l and to register withthe combustion chamber when said piston is at the limit of its workingstroke as shown in 2. Apislon pin connection 14 is shown clamped intoplace on the inside of the pision and a packing groove 13 is arrangednear the lower end of the compression cylinder to receive a packing toprevent leakage from the lower cylinder into the upper.

In the use of this engine, when the piston 3 is at the limit of itsinward or Working stroke as shown in 2, all of the exhaust or spentgases have been forced out through the exhaust pori; i2 and sheexplosive mixture from the carburetor l1 rushes into ihe compressioncylinder above the piston 3 because of the vacuum which is formed insaid cylinder by the inward stroke of the piston. Then as the pisionmoves outward, this mixlure is compressed between the outer end of thecom ression chamber and the outer end of the piston until the pistonnearly reaches the limit of its outer stroke when the auxiliary' inletport 8 is brought inio communication wish the lay-pass 9 and she gas inthe compression chamber rushes into the piston chamber 7 and when thepiston moves in word into the position shown in Fig. 2, the auxiliaryinlet 8 regisoers with the combustion chamber 4 and the compressed gasin the piston. chamber rushes out into the combustion chamber forcingout the exhaust or spent gases and is again compressed in the combustionchamber on the outer stroke of the piston and is fired in the ordinarymanner by the sparking plug which is so timed for this purpose. As thisoperation must be repeated at each revolution or double stroke of thepiston, it produces a two stroke or two cycle engine and because of thepackings of the cylinders and the absence of crank case compremion, itis obvious that this engine may be used as a rotary motor.

I claim as my invention:

1. In an internal combustion engine, the combination of a cylinderhaving a smaller axial extension forming a compression chamber, a pistonworking in said cylinder and provided with an axial extension working inthe compression chamber, the outer end of said compression chamberhaving a by-pass formed therein, a chamber formed in the outer end ofsaid piston and having a passage positioned to register with saidby-pa'ss when the piston is nearing the limit of its compression strokeand for registering with the combustion chamber when it nears the limitof its working stroke.

2. In an internalcombu'stion engine, the combination of a cylinderhaving an axial extension of less diameter forming a compressionchamber, of a power piston fitting the cylinder and having an axialextension fitting the compression chamber, said piston being hollow andprovided near its outer end with a transverse partition forming a gasreceiving chamber, said gas receiving chamber having an opening in oneside wall thereof, the compression chamber being provided near its outerend with a by-pass adapted to register with the opening in the A istonchamber when the piston nearsthe imit of its compression stroke, saidopening being also positioned to register with the combustion chamberwhen the piston nears the limit of its working stroke.

3. In an internal combustion engine, the combination of a cylinderhaving an axial extension of less diameter forming a compressionchamber, of a power piston fitting the cylinder and having an axialextension fitting the compression chamber, said piston being hollow andprovided near its outer end with a transverse partition forming a gasreceiving chamber, said gas receiving chamber having an opening in oneside wall thereof, the compression chamber being provided near its outerend with a by-pass adapted to register with the opening in the pistonchamber when the piston nears the limit of its compression stroke, saidopening being also positioned to register with the combustion chamberwhen the piston nears the limit of its working stroke, and a piston pinconnection clamped into position on the inside of said piston.

In testimony whereof I have hereunto set my hand in presence of twosubscribing wit-

